FESTUCA | GRAMINE 4 769 
BROMUS 
feet high: panicle 5-7 inches long, interrupted, more or less pubescent through- 
out: spikelets 5-8-flowered: second ‘glume oblong, abruptly acute, flowering. 
glumes oval, acute: palets linear, acute, longer than the glumes, Oregon. 
Var. littoralis Vasey, Beal |. c. Smooth and glaucous: stems 5-10 
inches high, from creeping rootstocks: panicle dense, secund, 2-3 inches long: 
spikelets usually 5-flowered, the second glume ovate-lanceolate, 3-nerved, flower- 
ing glumes oval, acute: awns 14-1 line long. On sand banks along the coast of 
Oregon. 
F. heterophylla Lam. FI. Fr. ed. 1, 600. A densely cespitose per 
ennial: stems slender, 2—3 feet high: sheaths smooth: leaves smooth, soft, con 
volute, those of the stem usually 3, flat: panicle 3-8 inches long, lax, nodding 
its branches in twos or threes: spikelets lirear-oblong, 3-6-flowered: empty 
glumes unequal, very acute, the second subulate-lanceolate, 3-nerved; the lateral 
nerves short: flowering glumes linear-lanceolate, 3-4 lines long, very acute: awns 
half as long as the glumes or longer: palets linear-oblong. . Washington to 
Brit. Columbia and Michigan. 
49 BROMUS L. Sp. 76. 
Annual or perennial grasses with flat leaves and numerous 
spikelets in terminal panicles, the pedicels thickened at the sum- 
mit. Spikelets few to many-flowered, the two lower glumes emp- 
ty, unequal, acute: flowering glumes rounded on the back, or 
sometimes compressed-keeled, 5-9-nerved, the apex usually 2- 
toothed, generally bearing an awn just below the summit. Palet 
shorter than the glumes. 2-keeled. Stamens usually 3. Stigmas 
sessile, plumose, inserted below a hairy cushion-like appendage 
at the top of the ovary. Grain adherent to the palet.. 
§ 1 kEuBromus Annuals or biennials with empty glumes 
rather broad and flowering glumes broadly elliptic to oblong- 
elliptic. All introduced from Europe. 
B. secaxinus L. Sp. 76. Stems 1-3 feet high, erect, smooth: sheaths 
usually shorter than the internodes: ligules 4 line long, erose leaves 2-6 inches 
long, 1-3 lines wide, sometimes rougk or hairy: panicle open, its branches 
ascending or drooping: spikelets turgid, glabrous, 6-10-flowered: empty glumes 
scabrous toward the apex, the first 3-nerved, acute, second longer and broader, 
7-nerved, obtuse: flowering glumes 3-4 lines long, broad, obtuse, rough toward 
the apex, awnless or bearing a straight awn between the obtuse teeth: palets 
about equalling the glumes. Common in fields everywhere, 
B. racemosus L. Sp. ed. 2, 144. Stemserect, 1-3 feet high, smooth, 
or sparingly pubescent below the panicle: sheaths shorter than the internodes: 
ligules 1 line long: leaves 1-9 inches long, 4-4 lines wide, pubescent: panicle 
1-10 inches long, its branches erect or ascending: spikelets erect, 5-11-flower- 
ed: empty glumes acute, the first 3-nerved, the second longer and broader, 5-9- 
nerved ; flowering glumes broad, 344-446 lines long, obtuse, smooth and shining, — 
the nerves prominent: awns straight, 3-4 lines long: palets shorter than. the 
glumes. Common in meadows and waste places, 
VAR. commourTatus Hook. f. Steud. Fl. Brit. Isl. 451. Panicle rather 
broader: spikelets larger, Common in waste places. . 
B. worpeacsous’L. Sp. 77. B. mollis L. Stems 8-36 inches long, 
erect, often slender, usually pubescent below the panicle: sheaths shorter than 
the internodes, mostly pubescent: ligules 4g line long: leaves 1-7 inches long, 
1-3 lines wide, pubescent: panicle generally contracted, its branches erect or 
